Distributor for pulverulent fuel burners and method of making same



y 1932- w. KLEINOW 1,861,410

DISTRIBUTOR FOR PULVERULENT FUEL BURNERS AND METHOD OF MAKING SAME Filed Jan. 9, 1929 2 Sheets-Shee 1 J 17 wuuuuu /5 7 mi e/11w.-

Lfi F 4, We: lter K/einow,

M g by Wm H/s A ttor-ney.

y 1932- w. KLEINOW 1,861,410

DISTRIBUTOR FOR PULVERULENT FUEL BURNERS AND METHOD OF MAKING SAME Filed Jan. 9, 1929 2 Sheets-Sheet 2 &3

Inventor:

ln/a lter' K/einow Patented May 31, 1932 UNITED STATES PATENT OFFICE WALTER KLEINOW, OF HENNIGSDORF, NEAR BERLIN, GERMANY, ASSIGNOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK DISTRIBUTOR FOR PULVERUIJ'ENT FUEL BURNEBS AND METHOD OF MAKING SAME Application filed January 9, 1929, Serial No.

My invention relates to pulverulent fuel burners and more especially to a distributor for the mixture in such burners, as described for instance in U. S. Patent No. 1,739,035, granted December 10, 1929 to myself jointly with Albert Morgenroth, Friedrich Reinhardt and Wilhelm Bruer.

It is an object of my invention to so design a distributor of the kind described as to obtain a more intense churning of the mixture. To this end I so arrange the discharge slots with respect to the slots between the guide vanes that the free area is increased abruptly from the slots between the vanes to the discharge slots.

Heretofore the tendency was to obtain a smooth transit from the slots between the guide vanes to the discharge slots, but it has been found that it is preferable to provide means for disturbing the uniform flow of the mixture. It has already been suggested to provide nozzles having helical or other insertions for imparting rotary movement to the flowing mixture but such appliances are often unsatisfactory as the desired effect is counteracted by centrifugal action.

According to the present invention the churning of pulverulent fuel and the air in which it is suspended, is effected in a cheaper, simpler and more eflicient manner by providing a step or abrupt change of the free area at the point where the slots between the guide vanes open into the discharge slots. In this manner dead angles are formed which cause the generation of whirls breaking up the uniform flow of the mixture and effecting intense churning.

In the drawings aflixed to this specification and forming part thereof a distributor embodying my invention is illustrated diagrammatically by way of example.

In the drawings,

Fig. 1 is a horizontal section showing part of a burner unit and the distributor and guide vanes attached thereto.

Fig. 2 is a section similar to Fig. 1, but

drawn to a smaller scale.

Fig. 3 is an elevation of the parts illustrated in Figs. 1 and 2, viewed from the discharge slots of the distributor.

331,342, and in Germany January 13, 1928.

Figure 4 is a horizontal section showing the entire burner unit.

Figure 5 is a view showing a transverse section of the burner unit and coolers along line 55 of Figures 1 and 4.

Referring to the drawings and first to Fig. 1, 7 is a conduit through which the mixture of air and pulverulent fuel is supplied to the burner, 20 are guide vanes at one side of the conduit, 15 are slots between the vanes, 17 are ribs constituting the distributor described in the patent aforesaid, and 16 are slots between the ribs.

The width of the ribs 17 is less than that of the vanes 20 so that the slots 16 are wider than the slots 15 between the vanes and in this manner dead angles are formed by the ribs 17 of each pair and the corresponding vanes 20 in whichowhirls will form as indicated by the arrows, effecting an intense churning action, as is required for the complete combustion of the fuel. It will be understood that the expedient provided for attaining this object is extremely simple.

Referring now to Figs. 2 and 3, the vanes. 20 here shown are not formed by slotting a single plate of metal as described in the said patent, but a'set of vanes is built up from a plurality of plates which may be obtained by dividing a bar of rectangular cross section, each plate constituting a vane, and the slots 15 are produced by suitably recessing the vanes so that two vanes with their recesses make up one of the slots. In this manner the manufacture of the vanes is facilitated as it is obviously easier to machine curved recesses on separate plates than to machine curved slots in a single plate. Another advantage is that burners of any desired length may be built up from a suitable number of vanes.

The vanes 20 before being machined have the form of plates of rectangular section, each being provided with a recess 63 at one edge extending from the inner face of the plate to 1 its outer face and with a recess 64 extending from the inner edge of the recess 63 to the outer edge at the opposite end of the plate. The recesses preferably extend through the major part of the length of the plates only, so that each plate at its upper and lower end provides surfaces for securing it to the burner conduit 7, as described in the said patent. It will appear from the section, Fig. 2, that the recess 63 in each plate together with the Q recess 64 in the adjacent plate make up a curved slot when the plates are in abutting position.

Wish it to be understood that I do not desire to be limited to the exact details of 19 construction shown and described for obvious modifications will occur to a person skilled in the art.

'In the claims afiixed to this specification no selection of any particular modification of the 15 invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

I claim:

20 1. A fuel burner comprising a face plate having spaced discharge passages and ribs attached to said face plate intermediate said passages and of less thickness than the width of the face plate portion between said pas- 5 sages.

. 2-. A fuel burner comprising a plurality of spaced vanes forming slots through which the fuel is distributed, a ribbed structure adjacent to said burner, the ribs of which are positioned intermediate said slots and each rib of less thickness than the Width of the adjacent portion of said burner vane. 3. A fuel burner comprising a slotted face plate for distributing fuel, a ribbed structure adjacent to said face plate, the ribs of Which are positioned intermediate said slots and are of a thickness less than the distance between said adjacent slots thereby forming dead angles at the point of fuel emission from said slots.

4. A face plate for a pulverulent burner comprising a plurality of rectangular sections in spaced relation to one another, each section having a flat side, a concave side edge, a

convex side edge and a side forming an acute angle with the concave side edge and joining the convex side edge in a smooth curve.

5. A discharge plate for a pulverulent fuel burner comprising a plurality of rectangular sections in spaced relation to one another, each section having a flat side, a concave side edge, a convex side edge and a side forming an acute angle with the concave side edge and joining the convex side edge in a smooth curve, a rib attached to said fiat side, said rib of less thickness than the width of section to which it is attached thereby forming an abrupt widening of the discharge passage. In testimony whereof I aflix my signature.

* WALTER KLEINOW. 

